Description :  BOYING A306 Wireless Waterproof Doorbell Sefely Security Indoor Household Digital Adjustable AC Door Bell<br>  <br> Features :<br>  Plug-in， wire free. Iphone surface finishing， white color. FCC， CE and RoHS compliant. Transmitter \/ bell push IP44 waterproof. 1 million sets of auto-learning codes to avoid interference. Energy saving， transmitter battery can be used for over 15 months， and plug-in receiver working power consumption less than 5W Music volume adjustable.                        <br> Specification :  Brand Name: BOYING Model No: A306 Frequency: 315MHz&amp;plusmn;0.5MHz Active pressure wave(receiver): &amp;le; -57dbm Negative pressure wave(transmitter): &amp;le; -36dbm Power supply(receiver): AC 110\/240V Power supply(transmitter): 1pc 12V 23A (ALKALINE BATTERY) Working power consumption: &amp;le; 5W Transmit power: &amp;lt;10mW Operating range: 120 METERS(OPEN AREA) Sound options: 32 chimes，36 Polyphonic melodies<br>  <br> Package includeds :  1 x BOYING A306 Wireless Doorbell (Also come with an adapter according to your country~) 1 x Bag of Install screws 1 x 12V 23A Battery 1 x Double Side Adhesive<br>  <br> Details pictures :